当前位置: X-MOL 学术ACS Nano › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dynamics of Architecturally Engineered All-Polymer Nanocomposites
ACS Nano ( IF 17.1 ) Pub Date : 2018-10-09 00:00:00 , DOI: 10.1021/acsnano.8b02514
Erkan Senses 1, 2, 3 , Madhusudan Tyagi 1, 2 , Madeleine Pasco 4 , Antonio Faraone 1
Affiliation  

We present nanocomposite materials formed by using glassy star-shaped polymers as nanofillers and dispersing them in soft matrices. The resulting “architecturally engineered” polymer nanocomposites structurally reside between the linear homopolymer blends and the conventional polymer nanocomposites with inorganic fillers, inducing reinforcement, which can be as strong as that of solid nanoparticles, or softening depending on the compactness and concentration of the nanoparticles. Such behavior can be traced back to the dynamical features at the local segmental and the chain level, which we investigated using neutron scattering over a wide range of time and length scales in the glassy and melt states of the nanocomposites. The local and segmental dynamics as well as the degree of chain–chain entanglements are all modified by the star-shaped fillers. The presented approach to tuning the physical properties of all-polymer-based nanocomposites is readily adaptable to other polymer architectures with immediate applications in numerous areas including gas separation membranes, tissue engineering, drug delivery, and functional coatings.

中文翻译:

建筑工程全聚合物纳米复合材料的动力学

我们介绍了通过使用玻璃状星形聚合物作为纳米填料并将其分散在软基质中而形成的纳米复合材料。所得的“建筑工程设计的”聚合物纳米复合材料在结构上位于线性均聚物共混物和具有无机填料的常规聚合物纳米复合材料之间,可产生与固体纳米颗粒一样强的增强作用,或根据纳米颗粒的紧实度和浓度而软化。这种行为可以追溯到局部片段和链水平的动力学特征,我们使用纳米复合物在玻璃态和熔融态下在很长的时间和长度范围内使用中子散射进行了研究。星形填充物可以改变局部和分段动力学以及链与链的缠结程度。
更新日期:2018-10-09
down
wechat
bug